1 /**************************************************************************
3 * Copyright 2007 VMware, Inc.
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 **************************************************************************/
30 * Framebuffer/renderbuffer functions.
36 #include "main/imports.h"
37 #include "main/context.h"
38 #include "main/fbobject.h"
39 #include "main/framebuffer.h"
40 #include "main/glformats.h"
41 #include "main/macros.h"
42 #include "main/renderbuffer.h"
43 #include "main/state.h"
45 #include "pipe/p_context.h"
46 #include "pipe/p_defines.h"
47 #include "pipe/p_screen.h"
49 #include "st_context.h"
50 #include "st_cb_bufferobjects.h"
51 #include "st_cb_fbo.h"
52 #include "st_cb_flush.h"
53 #include "st_cb_texture.h"
54 #include "st_format.h"
55 #include "st_texture.h"
56 #include "st_manager.h"
58 #include "util/u_format.h"
59 #include "util/u_inlines.h"
60 #include "util/u_surface.h"
64 st_renderbuffer_alloc_sw_storage(struct gl_context
* ctx
,
65 struct gl_renderbuffer
*rb
,
66 GLenum internalFormat
,
67 GLuint width
, GLuint height
)
69 struct st_context
*st
= st_context(ctx
);
70 struct st_renderbuffer
*strb
= st_renderbuffer(rb
);
71 enum pipe_format format
;
77 if (internalFormat
== GL_RGBA16_SNORM
) {
78 /* Special case for software accum buffers. Otherwise, if the
79 * call to st_choose_renderbuffer_format() fails (because the
80 * driver doesn't support signed 16-bit/channel colors) we'd
81 * just return without allocating the software accum buffer.
83 format
= PIPE_FORMAT_R16G16B16A16_SNORM
;
86 format
= st_choose_renderbuffer_format(st
, internalFormat
, 0);
88 /* Not setting gl_renderbuffer::Format here will cause
89 * FRAMEBUFFER_UNSUPPORTED and ValidateFramebuffer will not be called.
91 if (format
== PIPE_FORMAT_NONE
) {
96 strb
->Base
.Format
= st_pipe_format_to_mesa_format(format
);
98 size
= _mesa_format_image_size(strb
->Base
.Format
, width
, height
, 1);
99 strb
->data
= malloc(size
);
100 return strb
->data
!= NULL
;
105 * gl_renderbuffer::AllocStorage()
106 * This is called to allocate the original drawing surface, and
107 * during window resize.
110 st_renderbuffer_alloc_storage(struct gl_context
* ctx
,
111 struct gl_renderbuffer
*rb
,
112 GLenum internalFormat
,
113 GLuint width
, GLuint height
)
115 struct st_context
*st
= st_context(ctx
);
116 struct pipe_screen
*screen
= st
->pipe
->screen
;
117 struct st_renderbuffer
*strb
= st_renderbuffer(rb
);
118 enum pipe_format format
= PIPE_FORMAT_NONE
;
119 struct pipe_resource templ
;
121 /* init renderbuffer fields */
122 strb
->Base
.Width
= width
;
123 strb
->Base
.Height
= height
;
124 strb
->Base
._BaseFormat
= _mesa_base_fbo_format(ctx
, internalFormat
);
125 strb
->defined
= GL_FALSE
; /* undefined contents now */
127 if (strb
->software
) {
128 return st_renderbuffer_alloc_sw_storage(ctx
, rb
, internalFormat
,
132 /* Free the old surface and texture
134 pipe_surface_reference(&strb
->surface_srgb
, NULL
);
135 pipe_surface_reference(&strb
->surface_linear
, NULL
);
136 strb
->surface
= NULL
;
137 pipe_resource_reference(&strb
->texture
, NULL
);
139 /* If an sRGB framebuffer is unsupported, sRGB formats behave like linear
142 if (!ctx
->Extensions
.EXT_framebuffer_sRGB
) {
143 internalFormat
= _mesa_get_linear_internalformat(internalFormat
);
146 /* Handle multisample renderbuffers first.
148 * From ARB_framebuffer_object:
149 * If <samples> is zero, then RENDERBUFFER_SAMPLES is set to zero.
150 * Otherwise <samples> represents a request for a desired minimum
151 * number of samples. Since different implementations may support
152 * different sample counts for multisampled rendering, the actual
153 * number of samples allocated for the renderbuffer image is
154 * implementation dependent. However, the resulting value for
155 * RENDERBUFFER_SAMPLES is guaranteed to be greater than or equal
156 * to <samples> and no more than the next larger sample count supported
157 * by the implementation.
159 * Find the supported number of samples >= rb->NumSamples
161 if (rb
->NumSamples
> 0) {
164 if (ctx
->Const
.MaxSamples
> 1 && rb
->NumSamples
== 1) {
165 /* don't try num_samples = 1 with drivers that support real msaa */
168 start
= rb
->NumSamples
;
171 for (i
= start
; i
<= ctx
->Const
.MaxSamples
; i
++) {
172 format
= st_choose_renderbuffer_format(st
, internalFormat
, i
);
174 if (format
!= PIPE_FORMAT_NONE
) {
180 format
= st_choose_renderbuffer_format(st
, internalFormat
, 0);
183 /* Not setting gl_renderbuffer::Format here will cause
184 * FRAMEBUFFER_UNSUPPORTED and ValidateFramebuffer will not be called.
186 if (format
== PIPE_FORMAT_NONE
) {
190 strb
->Base
.Format
= st_pipe_format_to_mesa_format(format
);
192 if (width
== 0 || height
== 0) {
193 /* if size is zero, nothing to allocate */
197 /* Setup new texture template.
199 memset(&templ
, 0, sizeof(templ
));
200 templ
.target
= st
->internal_target
;
201 templ
.format
= format
;
202 templ
.width0
= width
;
203 templ
.height0
= height
;
205 templ
.array_size
= 1;
206 templ
.nr_samples
= rb
->NumSamples
;
207 if (util_format_is_depth_or_stencil(format
)) {
208 templ
.bind
= PIPE_BIND_DEPTH_STENCIL
;
210 else if (strb
->Base
.Name
!= 0) {
211 /* this is a user-created renderbuffer */
212 templ
.bind
= PIPE_BIND_RENDER_TARGET
;
215 /* this is a window-system buffer */
216 templ
.bind
= (PIPE_BIND_DISPLAY_TARGET
|
217 PIPE_BIND_RENDER_TARGET
);
220 strb
->texture
= screen
->resource_create(screen
, &templ
);
225 st_update_renderbuffer_surface(st
, strb
);
226 return strb
->surface
!= NULL
;
231 * gl_renderbuffer::Delete()
234 st_renderbuffer_delete(struct gl_context
*ctx
, struct gl_renderbuffer
*rb
)
236 struct st_renderbuffer
*strb
= st_renderbuffer(rb
);
238 struct st_context
*st
= st_context(ctx
);
239 pipe_surface_release(st
->pipe
, &strb
->surface_srgb
);
240 pipe_surface_release(st
->pipe
, &strb
->surface_linear
);
241 strb
->surface
= NULL
;
243 pipe_resource_reference(&strb
->texture
, NULL
);
245 _mesa_delete_renderbuffer(ctx
, rb
);
250 * Called via ctx->Driver.NewRenderbuffer()
252 static struct gl_renderbuffer
*
253 st_new_renderbuffer(struct gl_context
*ctx
, GLuint name
)
255 struct st_renderbuffer
*strb
= ST_CALLOC_STRUCT(st_renderbuffer
);
258 _mesa_init_renderbuffer(&strb
->Base
, name
);
259 strb
->Base
.Delete
= st_renderbuffer_delete
;
260 strb
->Base
.AllocStorage
= st_renderbuffer_alloc_storage
;
268 * Allocate a renderbuffer for an on-screen window (not a user-created
269 * renderbuffer). The window system code determines the format.
271 struct gl_renderbuffer
*
272 st_new_renderbuffer_fb(enum pipe_format format
, unsigned samples
, boolean sw
)
274 struct st_renderbuffer
*strb
;
276 strb
= ST_CALLOC_STRUCT(st_renderbuffer
);
278 _mesa_error(NULL
, GL_OUT_OF_MEMORY
, "creating renderbuffer");
282 _mesa_init_renderbuffer(&strb
->Base
, 0);
283 strb
->Base
.ClassID
= 0x4242; /* just a unique value */
284 strb
->Base
.NumSamples
= samples
;
285 strb
->Base
.Format
= st_pipe_format_to_mesa_format(format
);
286 strb
->Base
._BaseFormat
= _mesa_get_format_base_format(strb
->Base
.Format
);
290 case PIPE_FORMAT_B10G10R10A2_UNORM
:
291 case PIPE_FORMAT_R10G10B10A2_UNORM
:
292 strb
->Base
.InternalFormat
= GL_RGB10_A2
;
294 case PIPE_FORMAT_R10G10B10X2_UNORM
:
295 case PIPE_FORMAT_B10G10R10X2_UNORM
:
296 strb
->Base
.InternalFormat
= GL_RGB10
;
298 case PIPE_FORMAT_R8G8B8A8_UNORM
:
299 case PIPE_FORMAT_B8G8R8A8_UNORM
:
300 case PIPE_FORMAT_A8R8G8B8_UNORM
:
301 strb
->Base
.InternalFormat
= GL_RGBA8
;
303 case PIPE_FORMAT_R8G8B8X8_UNORM
:
304 case PIPE_FORMAT_B8G8R8X8_UNORM
:
305 case PIPE_FORMAT_X8R8G8B8_UNORM
:
306 strb
->Base
.InternalFormat
= GL_RGB8
;
308 case PIPE_FORMAT_R8G8B8A8_SRGB
:
309 case PIPE_FORMAT_B8G8R8A8_SRGB
:
310 case PIPE_FORMAT_A8R8G8B8_SRGB
:
311 strb
->Base
.InternalFormat
= GL_SRGB8_ALPHA8
;
313 case PIPE_FORMAT_R8G8B8X8_SRGB
:
314 case PIPE_FORMAT_B8G8R8X8_SRGB
:
315 case PIPE_FORMAT_X8R8G8B8_SRGB
:
316 strb
->Base
.InternalFormat
= GL_SRGB8
;
318 case PIPE_FORMAT_B5G5R5A1_UNORM
:
319 strb
->Base
.InternalFormat
= GL_RGB5_A1
;
321 case PIPE_FORMAT_B4G4R4A4_UNORM
:
322 strb
->Base
.InternalFormat
= GL_RGBA4
;
324 case PIPE_FORMAT_B5G6R5_UNORM
:
325 strb
->Base
.InternalFormat
= GL_RGB565
;
327 case PIPE_FORMAT_Z16_UNORM
:
328 strb
->Base
.InternalFormat
= GL_DEPTH_COMPONENT16
;
330 case PIPE_FORMAT_Z32_UNORM
:
331 strb
->Base
.InternalFormat
= GL_DEPTH_COMPONENT32
;
333 case PIPE_FORMAT_Z24_UNORM_S8_UINT
:
334 case PIPE_FORMAT_S8_UINT_Z24_UNORM
:
335 strb
->Base
.InternalFormat
= GL_DEPTH24_STENCIL8_EXT
;
337 case PIPE_FORMAT_Z24X8_UNORM
:
338 case PIPE_FORMAT_X8Z24_UNORM
:
339 strb
->Base
.InternalFormat
= GL_DEPTH_COMPONENT24
;
341 case PIPE_FORMAT_S8_UINT
:
342 strb
->Base
.InternalFormat
= GL_STENCIL_INDEX8_EXT
;
344 case PIPE_FORMAT_R16G16B16A16_SNORM
:
346 strb
->Base
.InternalFormat
= GL_RGBA16_SNORM
;
348 case PIPE_FORMAT_R16G16B16A16_UNORM
:
349 strb
->Base
.InternalFormat
= GL_RGBA16
;
351 case PIPE_FORMAT_R8_UNORM
:
352 strb
->Base
.InternalFormat
= GL_R8
;
354 case PIPE_FORMAT_R8G8_UNORM
:
355 strb
->Base
.InternalFormat
= GL_RG8
;
357 case PIPE_FORMAT_R16_UNORM
:
358 strb
->Base
.InternalFormat
= GL_R16
;
360 case PIPE_FORMAT_R16G16_UNORM
:
361 strb
->Base
.InternalFormat
= GL_RG16
;
363 case PIPE_FORMAT_R32G32B32A32_FLOAT
:
364 strb
->Base
.InternalFormat
= GL_RGBA32F
;
366 case PIPE_FORMAT_R16G16B16A16_FLOAT
:
367 strb
->Base
.InternalFormat
= GL_RGBA16F
;
371 "Unexpected format %s in st_new_renderbuffer_fb",
372 util_format_name(format
));
377 /* st-specific methods */
378 strb
->Base
.Delete
= st_renderbuffer_delete
;
379 strb
->Base
.AllocStorage
= st_renderbuffer_alloc_storage
;
381 /* surface is allocated in st_renderbuffer_alloc_storage() */
382 strb
->surface
= NULL
;
389 * Create or update the pipe_surface of a FBO renderbuffer.
390 * This is usually called after st_finalize_texture.
393 st_update_renderbuffer_surface(struct st_context
*st
,
394 struct st_renderbuffer
*strb
)
396 struct pipe_context
*pipe
= st
->pipe
;
397 struct pipe_resource
*resource
= strb
->texture
;
398 const struct st_texture_object
*stTexObj
= NULL
;
399 unsigned rtt_width
= strb
->Base
.Width
;
400 unsigned rtt_height
= strb
->Base
.Height
;
401 unsigned rtt_depth
= strb
->Base
.Depth
;
404 * For winsys fbo, it is possible that the renderbuffer is sRGB-capable but
405 * the format of strb->texture is linear (because we have no control over
406 * the format). Check strb->Base.Format instead of strb->texture->format
407 * to determine if the rb is sRGB-capable.
409 boolean enable_srgb
= st
->ctx
->Color
.sRGBEnabled
&&
410 _mesa_get_format_color_encoding(strb
->Base
.Format
) == GL_SRGB
;
411 enum pipe_format format
= resource
->format
;
414 stTexObj
= st_texture_object(strb
->Base
.TexImage
->TexObject
);
415 if (stTexObj
->surface_based
)
416 format
= stTexObj
->surface_format
;
419 format
= enable_srgb
? util_format_srgb(format
) : util_format_linear(format
);
421 if (resource
->target
== PIPE_TEXTURE_1D_ARRAY
) {
422 rtt_depth
= rtt_height
;
426 /* find matching mipmap level size */
428 for (level
= 0; level
<= resource
->last_level
; level
++) {
429 if (u_minify(resource
->width0
, level
) == rtt_width
&&
430 u_minify(resource
->height0
, level
) == rtt_height
&&
431 (resource
->target
!= PIPE_TEXTURE_3D
||
432 u_minify(resource
->depth0
, level
) == rtt_depth
)) {
436 assert(level
<= resource
->last_level
);
438 /* determine the layer bounds */
439 unsigned first_layer
, last_layer
;
440 if (strb
->rtt_layered
) {
442 last_layer
= util_max_layer(strb
->texture
, level
);
446 last_layer
= strb
->rtt_face
+ strb
->rtt_slice
;
449 /* Adjust for texture views */
450 if (strb
->is_rtt
&& resource
->array_size
> 1 &&
451 stTexObj
->base
.Immutable
) {
452 const struct gl_texture_object
*tex
= &stTexObj
->base
;
453 first_layer
+= tex
->MinLayer
;
454 if (!strb
->rtt_layered
)
455 last_layer
+= tex
->MinLayer
;
457 last_layer
= MIN2(first_layer
+ tex
->NumLayers
- 1, last_layer
);
460 struct pipe_surface
**psurf
=
461 enable_srgb
? &strb
->surface_srgb
: &strb
->surface_linear
;
462 struct pipe_surface
*surf
= *psurf
;
465 surf
->texture
->nr_samples
!= strb
->Base
.NumSamples
||
466 surf
->format
!= format
||
467 surf
->texture
!= resource
||
468 surf
->width
!= rtt_width
||
469 surf
->height
!= rtt_height
||
470 surf
->u
.tex
.level
!= level
||
471 surf
->u
.tex
.first_layer
!= first_layer
||
472 surf
->u
.tex
.last_layer
!= last_layer
) {
473 /* create a new pipe_surface */
474 struct pipe_surface surf_tmpl
;
475 memset(&surf_tmpl
, 0, sizeof(surf_tmpl
));
476 surf_tmpl
.format
= format
;
477 surf_tmpl
.u
.tex
.level
= level
;
478 surf_tmpl
.u
.tex
.first_layer
= first_layer
;
479 surf_tmpl
.u
.tex
.last_layer
= last_layer
;
481 pipe_surface_release(pipe
, psurf
);
483 *psurf
= pipe
->create_surface(pipe
, resource
, &surf_tmpl
);
485 strb
->surface
= *psurf
;
490 * Return the pipe_resource which stores a particular texture image.
492 static struct pipe_resource
*
493 get_teximage_resource(struct gl_texture_object
*texObj
,
494 unsigned face
, unsigned level
)
496 struct st_texture_image
*stImg
=
497 st_texture_image(texObj
->Image
[face
][level
]);
504 * Called by ctx->Driver.RenderTexture
507 st_render_texture(struct gl_context
*ctx
,
508 struct gl_framebuffer
*fb
,
509 struct gl_renderbuffer_attachment
*att
)
511 struct st_context
*st
= st_context(ctx
);
512 struct gl_renderbuffer
*rb
= att
->Renderbuffer
;
513 struct st_renderbuffer
*strb
= st_renderbuffer(rb
);
514 struct pipe_resource
*pt
;
516 pt
= get_teximage_resource(att
->Texture
,
521 /* point renderbuffer at texobject */
523 strb
->rtt_face
= att
->CubeMapFace
;
524 strb
->rtt_slice
= att
->Zoffset
;
525 strb
->rtt_layered
= att
->Layered
;
526 pipe_resource_reference(&strb
->texture
, pt
);
528 st_update_renderbuffer_surface(st
, strb
);
530 /* Invalidate buffer state so that the pipe's framebuffer state
532 * That's where the new renderbuffer (which we just created) gets
533 * passed to the pipe as a (color/depth) render target.
535 st_invalidate_buffers(st
);
538 /* Need to trigger a call to update_framebuffer() since we just
539 * attached a new renderbuffer.
541 ctx
->NewState
|= _NEW_BUFFERS
;
546 * Called via ctx->Driver.FinishRenderTexture.
549 st_finish_render_texture(struct gl_context
*ctx
, struct gl_renderbuffer
*rb
)
551 struct st_context
*st
= st_context(ctx
);
552 struct st_renderbuffer
*strb
= st_renderbuffer(rb
);
557 strb
->is_rtt
= FALSE
;
559 /* restore previous framebuffer state */
560 st_invalidate_buffers(st
);
566 st_fbo_invalid(const char *reason
)
568 if (MESA_DEBUG_FLAGS
& DEBUG_INCOMPLETE_FBO
) {
569 _mesa_debug(NULL
, "Invalid FBO: %s\n", reason
);
575 * Validate a renderbuffer attachment for a particular set of bindings.
578 st_validate_attachment(struct gl_context
*ctx
,
579 struct pipe_screen
*screen
,
580 const struct gl_renderbuffer_attachment
*att
,
583 const struct st_texture_object
*stObj
= st_texture_object(att
->Texture
);
584 enum pipe_format format
;
585 mesa_format texFormat
;
588 /* Sanity check: we must be binding the surface as a (color) render target
589 * or depth/stencil target.
591 assert(bindings
== PIPE_BIND_RENDER_TARGET
||
592 bindings
== PIPE_BIND_DEPTH_STENCIL
);
594 /* Only validate texture attachments for now, since
595 * st_renderbuffer_alloc_storage makes sure that
596 * the format is supported.
598 if (att
->Type
!= GL_TEXTURE
)
601 if (!stObj
|| !stObj
->pt
)
604 format
= stObj
->pt
->format
;
605 texFormat
= att
->Renderbuffer
->TexImage
->TexFormat
;
607 /* If the encoding is sRGB and sRGB rendering cannot be enabled,
608 * check for linear format support instead.
609 * Later when we create a surface, we change the format to a linear one. */
610 if (!ctx
->Extensions
.EXT_framebuffer_sRGB
&&
611 _mesa_get_format_color_encoding(texFormat
) == GL_SRGB
) {
612 const mesa_format linearFormat
= _mesa_get_srgb_format_linear(texFormat
);
613 format
= st_mesa_format_to_pipe_format(st_context(ctx
), linearFormat
);
616 valid
= screen
->is_format_supported(screen
, format
,
618 stObj
->pt
->nr_samples
, bindings
);
620 st_fbo_invalid("Invalid format");
628 * Check that the framebuffer configuration is valid in terms of what
629 * the driver can support.
631 * For Gallium we only supports combined Z+stencil, not separate buffers.
634 st_validate_framebuffer(struct gl_context
*ctx
, struct gl_framebuffer
*fb
)
636 struct st_context
*st
= st_context(ctx
);
637 struct pipe_screen
*screen
= st
->pipe
->screen
;
638 const struct gl_renderbuffer_attachment
*depth
=
639 &fb
->Attachment
[BUFFER_DEPTH
];
640 const struct gl_renderbuffer_attachment
*stencil
=
641 &fb
->Attachment
[BUFFER_STENCIL
];
643 enum pipe_format first_format
= PIPE_FORMAT_NONE
;
644 boolean mixed_formats
=
645 screen
->get_param(screen
, PIPE_CAP_MIXED_COLORBUFFER_FORMATS
) != 0;
647 if (depth
->Type
&& stencil
->Type
&& depth
->Type
!= stencil
->Type
) {
648 st_fbo_invalid("Different Depth/Stencil buffer formats");
649 fb
->_Status
= GL_FRAMEBUFFER_UNSUPPORTED_EXT
;
652 if (depth
->Type
== GL_RENDERBUFFER_EXT
&&
653 stencil
->Type
== GL_RENDERBUFFER_EXT
&&
654 depth
->Renderbuffer
!= stencil
->Renderbuffer
) {
655 st_fbo_invalid("Separate Depth/Stencil buffers");
656 fb
->_Status
= GL_FRAMEBUFFER_UNSUPPORTED_EXT
;
659 if (depth
->Type
== GL_TEXTURE
&&
660 stencil
->Type
== GL_TEXTURE
&&
661 depth
->Texture
!= stencil
->Texture
) {
662 fb
->_Status
= GL_FRAMEBUFFER_UNSUPPORTED_EXT
;
663 st_fbo_invalid("Different Depth/Stencil textures");
667 if (!st_validate_attachment(ctx
, screen
, depth
, PIPE_BIND_DEPTH_STENCIL
)) {
668 fb
->_Status
= GL_FRAMEBUFFER_UNSUPPORTED_EXT
;
669 st_fbo_invalid("Invalid depth attachment");
672 if (!st_validate_attachment(ctx
, screen
, stencil
, PIPE_BIND_DEPTH_STENCIL
)) {
673 fb
->_Status
= GL_FRAMEBUFFER_UNSUPPORTED_EXT
;
674 st_fbo_invalid("Invalid stencil attachment");
677 for (i
= 0; i
< ctx
->Const
.MaxColorAttachments
; i
++) {
678 struct gl_renderbuffer_attachment
*att
=
679 &fb
->Attachment
[BUFFER_COLOR0
+ i
];
680 enum pipe_format format
;
682 if (!st_validate_attachment(ctx
, screen
, att
, PIPE_BIND_RENDER_TARGET
)) {
683 fb
->_Status
= GL_FRAMEBUFFER_UNSUPPORTED_EXT
;
684 st_fbo_invalid("Invalid color attachment");
688 if (!mixed_formats
) {
689 /* Disallow mixed formats. */
690 if (att
->Type
!= GL_NONE
) {
691 format
= st_renderbuffer(att
->Renderbuffer
)->surface
->format
;
696 if (first_format
== PIPE_FORMAT_NONE
) {
697 first_format
= format
;
698 } else if (format
!= first_format
) {
699 fb
->_Status
= GL_FRAMEBUFFER_UNSUPPORTED_EXT
;
700 st_fbo_invalid("Mixed color formats");
709 * Called via glDrawBuffer. We only provide this driver function so that we
710 * can check if we need to allocate a new renderbuffer. Specifically, we
711 * don't usually allocate a front color buffer when using a double-buffered
712 * visual. But if the app calls glDrawBuffer(GL_FRONT) we need to allocate
713 * that buffer. Note, this is only for window system buffers, not user-
717 st_DrawBufferAllocate(struct gl_context
*ctx
)
719 struct st_context
*st
= st_context(ctx
);
720 struct gl_framebuffer
*fb
= ctx
->DrawBuffer
;
722 if (_mesa_is_winsys_fbo(fb
)) {
724 /* add the renderbuffers on demand */
725 for (i
= 0; i
< fb
->_NumColorDrawBuffers
; i
++) {
726 gl_buffer_index idx
= fb
->_ColorDrawBufferIndexes
[i
];
728 if (idx
!= BUFFER_NONE
) {
729 st_manager_add_color_renderbuffer(st
, fb
, idx
);
737 * Called via glReadBuffer. As with st_DrawBufferAllocate, we use this
738 * function to check if we need to allocate a renderbuffer on demand.
741 st_ReadBuffer(struct gl_context
*ctx
, GLenum buffer
)
743 struct st_context
*st
= st_context(ctx
);
744 struct gl_framebuffer
*fb
= ctx
->ReadBuffer
;
748 /* Check if we need to allocate a front color buffer.
749 * Front buffers are often allocated on demand (other color buffers are
750 * always allocated in advance).
752 if ((fb
->_ColorReadBufferIndex
== BUFFER_FRONT_LEFT
||
753 fb
->_ColorReadBufferIndex
== BUFFER_FRONT_RIGHT
) &&
754 fb
->Attachment
[fb
->_ColorReadBufferIndex
].Type
== GL_NONE
) {
755 assert(_mesa_is_winsys_fbo(fb
));
757 st_manager_add_color_renderbuffer(st
, fb
, fb
->_ColorReadBufferIndex
);
758 _mesa_update_state(ctx
);
759 st_validate_state(st
, ST_PIPELINE_UPDATE_FRAMEBUFFER
);
766 * Called via ctx->Driver.MapRenderbuffer.
769 st_MapRenderbuffer(struct gl_context
*ctx
,
770 struct gl_renderbuffer
*rb
,
771 GLuint x
, GLuint y
, GLuint w
, GLuint h
,
773 GLubyte
**mapOut
, GLint
*rowStrideOut
)
775 struct st_context
*st
= st_context(ctx
);
776 struct st_renderbuffer
*strb
= st_renderbuffer(rb
);
777 struct pipe_context
*pipe
= st
->pipe
;
778 const GLboolean invert
= rb
->Name
== 0;
782 if (strb
->software
) {
783 /* software-allocated renderbuffer (probably an accum buffer) */
785 GLint bpp
= _mesa_get_format_bytes(strb
->Base
.Format
);
786 GLint stride
= _mesa_format_row_stride(strb
->Base
.Format
,
788 *mapOut
= (GLubyte
*) strb
->data
+ y
* stride
+ x
* bpp
;
789 *rowStrideOut
= stride
;
798 /* Check for unexpected flags */
799 assert((mode
& ~(GL_MAP_READ_BIT
|
801 GL_MAP_INVALIDATE_RANGE_BIT
)) == 0);
803 const enum pipe_transfer_usage transfer_flags
=
804 st_access_flags_to_transfer_flags(mode
, false);
806 /* Note: y=0=bottom of buffer while y2=0=top of buffer.
807 * 'invert' will be true for window-system buffers and false for
808 * user-allocated renderbuffers and textures.
811 y2
= strb
->Base
.Height
- y
- h
;
815 map
= pipe_transfer_map(pipe
,
817 strb
->surface
->u
.tex
.level
,
818 strb
->surface
->u
.tex
.first_layer
,
819 transfer_flags
, x
, y2
, w
, h
, &strb
->transfer
);
822 *rowStrideOut
= -(int) strb
->transfer
->stride
;
823 map
+= (h
- 1) * strb
->transfer
->stride
;
826 *rowStrideOut
= strb
->transfer
->stride
;
838 * Called via ctx->Driver.UnmapRenderbuffer.
841 st_UnmapRenderbuffer(struct gl_context
*ctx
,
842 struct gl_renderbuffer
*rb
)
844 struct st_context
*st
= st_context(ctx
);
845 struct st_renderbuffer
*strb
= st_renderbuffer(rb
);
846 struct pipe_context
*pipe
= st
->pipe
;
848 if (strb
->software
) {
849 /* software-allocated renderbuffer (probably an accum buffer) */
853 pipe_transfer_unmap(pipe
, strb
->transfer
);
854 strb
->transfer
= NULL
;
859 * Called via ctx->Driver.EvaluateDepthValues.
862 st_EvaluateDepthValues(struct gl_context
*ctx
)
864 struct st_context
*st
= st_context(ctx
);
866 st_validate_state(st
, ST_PIPELINE_UPDATE_FRAMEBUFFER
);
868 st
->pipe
->evaluate_depth_buffer(st
->pipe
);
873 st_init_fbo_functions(struct dd_function_table
*functions
)
875 functions
->NewFramebuffer
= _mesa_new_framebuffer
;
876 functions
->NewRenderbuffer
= st_new_renderbuffer
;
877 functions
->FramebufferRenderbuffer
= _mesa_FramebufferRenderbuffer_sw
;
878 functions
->RenderTexture
= st_render_texture
;
879 functions
->FinishRenderTexture
= st_finish_render_texture
;
880 functions
->ValidateFramebuffer
= st_validate_framebuffer
;
882 functions
->DrawBufferAllocate
= st_DrawBufferAllocate
;
883 functions
->ReadBuffer
= st_ReadBuffer
;
885 functions
->MapRenderbuffer
= st_MapRenderbuffer
;
886 functions
->UnmapRenderbuffer
= st_UnmapRenderbuffer
;
887 functions
->EvaluateDepthValues
= st_EvaluateDepthValues
;